Tire-plug.



R. SAMPSON.

` TIRE PLUG.

APPLICATION FILED MAR.31,1908.

923,896. A Patented June 8,1909.

15 hereinafter set forth.

In the drawings Figurelis a Vertical s ec- ROBERT SAMPSON, F MNTREAL, QUEBEC, CANADA.

. TIRE-PLUG.

` Specification of Letters Patent.

Patented June 8, 1909.

Application filed Hatch 31, v1908. Serial No. 424,356.

plugs which consists primarily of two metalc members to be clamped res ectively against the outer and inner sides ci) the tire by means of' a screw threaded shank; and "my improvements consist in the particulars tional view of one of my improved tire plugs, and Fig. 2 is a top view of the same; ig. 3 isa sectional view which shows the shank bent over parallel with the head of the plug;

Fig. 4 is a cross sectional view, and Fig. 5 1s a top view of my im roved rubber cap; and

' Fig. 6 is a top view o 'a modified form of cap..

Similar parts are designated by the same reference letters in all the iigures. v

A is a screw threaded shank havin its upper end a bent over to'form a finger old an having its lower end bent to one iside and terminating in a T head b.

C is a metallic head plate provided with a A central o ening c, through which the end of the shankJ A passes. On either side of this head plate I' prefer to place coverings d d l of canvas, paper, sheet brass or similar 3-5 material, the lower covering d being raised centrally so as to accommodatethe head b of the shank A.

E is a rubber ca which is stretched over the head plate C.l it is preferably of a mush- 40 roomed form, hollow, and has an openin e,

readily understood that, when the head ofv the lplug is forced through a puncture, its

edges will be subjected to more strain and' wear than its central portions; and that therefore it is important that the rubber should be reinforced and firmly held around the eriphery of the head plate.

is a co erating cap threaded upon the' shank A; an k is a washer of canvas or other suitable material placedV below the cap H. It will be seen that when the head of the plug ,is swung parallel with the stem, as shown in Fig. 3, and then forced throu h a uncture in a tire, it may be secured in p ace y running down the cap H, and then rotating the shank A inthe usual manner, the head b of the shank traveling between the under side of the head plateC and the covering d 4without abrading or injuring the rubber cap, the upper ed e of the cap being irmly gri ped between t e to of the head plate C an the inner 'face oft e tire, so as to form an air tight connection. The rubber cap thus eectually preventsthe leaka e of an air between the stem and the hea plate (l: and also revents the cutting of thel tire by the metalp bers of lthe plug andthe tire, will prevent abrading or corroding of the tire by direct contact With the metal cap or head plate,

head plate C; While the coverings Ad and k, when interposed between the memand will thus permit the use' of steel instead of brass, if it is desired to use a cheaper metal.

I ind it preferable to `make the rubber cap circular, as shown in Figs. 4 and 5; because, in practice, I find that in pushing the head of the plug through a puncture the greatest stress is exerted on it longitudinally, with a consequent tendency to displace the cap and then stretching it over the elongated head plate, its strongest grip will be against the ends of the plate, and it will be thereby eifectually held in position when being put through a puncture.

By making my plug in the manner described, I secure another novel feature in that the plug may be shipped or carried in stock in a knock-domi state, and the parts assembled by unskilled labor when required for use, for it will be seen that the end a of the shank may be iirst passed through .the opening c in the head plate C, the covering d and the washer zand the cap H may be then placed upon the shank, the end a of the shank, if desired, not being bent over until the cap has been run on the shank, the face covering d may be then put in place, and the head cap E rnav be then stretched over the head plate C, cbmpleting the assemblin of the parts of the plug ready for use. This is 90 lengthwise. But by making the cap circular l gether, facilitates sending them throug -animportant advantage, as` it allows the parts of the plug to be packed closely v by reversing the steps above described the members of the plug may be again separated without injury.

Having thus described my invention what I claim and desire to secure by Letters Patent of the United States is 1. In a tire plug, the combination, Witha metallic head-member of an elastic cap detachably attached thereto, and coperating clam ing mechanism.

2. l a tirelug, the combination, with an elongatedhea -member of a circular, elastic cap detachably attached thereto, and cooperating clamping mechanism.

3. In a tire plug, the combination, with a head member, of a shank detachably attached thereto, a coperatin clamp detach'- ably mountedupon said shan and a detachable, elastic cap embracing said head member.

4. The combination, in a tire plug, of an inner head member, an elastic cap detachably embracing the same, an exterior clamping cap and a shank connecting the inner head and the clamping cap, all of said parts being adapted to be readily separated Without injurythereto.

5. As a new article of manufacture, a head-cap for tire plugs lconsisting of a hollow, elastic body having an opening through one side into its hollow interior.

6. As a new article of manufacture, a head-cap for tire plugs consisting of a hollow, elastic body with relativelyr thickened edges and having an opening through one side into its hollow interior.

7. In a tire plug, the combination of a head having an opening therethrough, a shank passino' through said opening and having an end, formed by bending the eX- tremity of the shank to one side, slidably engaging behind said o ening, and a clamp cooperating with said s ank.

8. In a tire plug, the'eombination of a head having an opening therethrough, a shank passing through said opening and provided with an oiiset end, formed by bending the extremity of the shank tol one side, rotatably and slidably engaging behind said o ening,l and a clamp cooperating with said s rank.

9. In a tire plug, the combination of a metallic head member having an opening therethrough, a shank passing through said opening and provided with an end rotatably engaging behind the same, a flexible covering surrounding said metallic member and extending over the head of the shank, and a clamp coperating with said shank.

ROBERT. SAMPSON. Witnesses JAMES H. Davison, WILLIAM EWING. 

